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International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research ..

A metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials. They were originally designed to machine ...

I assume a centre drill is used to ensure a hole is in the right place? Is it simply because it is short and fat and therefore will not wander when it contacts the ...
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